Question

Which of the following is/are type(s) of smog?
A. Classical smog
B. Photochemical smog
C. Both A and B
D. None of the above

Answer 1

Hint: Smog is a mixture of smoke and fog. It causes air pollution and hence causes harm to living things. It is an intense air pollution reducing visibility and it is mainly produced from the burning of coal.

Complete answer:
Smog is derived from two words smoke and fog. It causes intense air pollution. The smog also reduces visibility. Smog is produced when the emissions from automobiles, factories, and industries react with sunlight and atmosphere. When smog is inhaled, it may cause the harmful effect on humans like coughing and wheezing, burning sensation in eyes and throat, risk of serious heart diseases, risk of serious lung disease. It is more dangerous for people suffering from asthma. It can also kill plants.
Smog is classified into two types:
A. Classical smog
This type of smog is found in areas which are having a humid climate. It is a mixture of smoke, fog, and sulphur dioxide. It is also known as reducing smog as it acts as a reducing in atmospheric pollution.
B. Photochemical smog
This type of smog occurs in dry and sunny areas around the world. Automobiles and factories emit large amounts of smoke which may contain hydrocarbons and nitrogen dioxide, these compounds in presence of sunlight forms the major component of photochemical smog. This type of smog contains a high concentration of oxidizing agents and hence it is also called as oxidizing smog.

Hence, the answer to the above question is option C.

Additional Information:
Fog is a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which prevents or reduces visibility.

Note: Atmospheric pollution causes harm to the living organisms directly as air has more priority than food. Therefore, atmospheric pollution should be considered a serious concern for survival on this planet. Smog is the major type of atmospheric pollutant.